My last post got me thinking about jellyfish. If jelly fish don't have eyes then do they just randomly swim around hoping they run into food and that they don't run into anything that will eat them? This seems like an extremely pointless existence.

i remember learning somewhere that there is one species of jelly fish with eyes that actually hunts its prey. most jellyfish don't have eyes and just swim around hoping to find stuff.

ah hah!

i just did a search and found some references:
for general jellyfish:
http://en.wikipedia.org/wiki/Jellyfish
it doesn't mention anything about eyes on jellyfish.

http://en.wikipedia.org/wiki/Box_jellyfish
these are the only species of jellyfish that i know of that has eyes. it has 24 around the middle of the "bell" allowing it to hunt its prey.

SCIENCE!!

Good research. I also found that jellyfish can sense smells and tastes in the water so I guess they use that to find tasty things to eat.

I think the jellyfish would win. Most jellyfish are really poisonous so if it stung the octopus there would be no contest. But some aren't poisonous (like the ones I touched the other day) and if an octopus went up against that it would win no contest. I wonder what would win between an octopus and a Humbolt squid?

(This conversation reminds me of a show on the Discovery channel where they pick two animals and predict what would happen if they fought. All through the show they have an expert hype up their animal and trash talk the other animal and then at the end they do a crappy computer simulation of the fight. It's crappy, hilarious, and awesome all at the same time.)

Octopus would win for sure. The Jellyfish is just a mindless bag floating around looking for smells and tastes where those Octopus are sneaky creatures.

Octopus Vs. Shark
http://video.nationalgeographic.com/vid ... 2536550447

But I think Octopus and Jelly fish would end up more like this one;
Octopus Vs. Bird
http://blue-water-video.blogspot.com/20 ... -bird.html